TMZ Sports talked to the UFC honcho outside the Montage in L.A. … and asked him for the lowdown on the DC and Brock Lesnar fight.

Dana told us he ain’t sure if the Lesnar fight will happen … but he does have a massive fight in mind.

Jon Jones vs. Daniel Cormier III.

“I’d obviously like to see Jones and Cormier fight again at heavyweight,” White tells us … “Cormier’s team wants him to retire now. They want him to retire right now. I hope we can get 3 more fights out of him.”

Remember, DC’s repeatedly said he’s gonna retire on his 40th birthday — but that’s still 4 months away — and walking away before was seemingly never an option … ’til now.

We also talked to Dana about Yair Rodriguez‘s INSANE last-second KO of the Korean Zombie … and White says there’s never been a better finish — in MMA, boxing or anywhere else people hit each other.

“I think it’s the best knockout in combat sports history. All of combat sports.”